inverse_squared.
inverse
Inverse of the power transform link function
`z` : array-like
Value of the transformed mean parameters at p
`p` : array
Mean parameters
Notes
g^(-1)(z`) = z`**(1/`power)
statsmodels.genmod.families.links.inverse_squared.deriv2
statsmodels.genmod.families.links.inverse_squared.inverse_deriv